<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>

</head>
<body>
   <div id="app"></div>
   <script type="text/babel">
    class App extends React.Component{
        state={
            count:0,
            mun:1 
        }
        render(){
            const {count,mun} =this.state;
            return (
                <div>
                    <button onClick={this.handle} >+</button>
                     <p>{count}</p>
                     <button onClick={this.Name} >+</button>
                     <p>{mun}</p>
                </div>
            )
        }
        handle=()=>{
             //直接修改state不会重新调用render 不会重新渲染
             let {count} = this.state;
             this.setState({count:count + 10})
        }
        Name=()=>{
            let {mun} = this.state;
            this.setState({mun:mun + 5})
        }
    }
    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<App/>)
   </script> 
</body>
</html>